+csc_compiler=default
+endian=unknown
+AC_C_BIGENDIAN([endian=big],[endian=little],[endian=unknown])
+AC_MSG_CHECKING([CSharp compiler to use])
+AC_ARG_WITH(csc, [ --with-csc=mcs,roslyn,default Configures the CSharp compiler to use],[
+ if test x$withval = xmcs; then
+ csc_compiler=mcs
+ elif test x$withval = xroslyn; then
+ csc_compiler=roslyn
+ elif test x$withval = xdefault; then
+ :
+ else
+ AC_MSG_ERROR([You must supply one of "mcs", "roslyn" or "default" to the --with-csc option])
+ fi
+],[csc_compiler=default])
+
+if test $csc_compiler = default; then
+ if test $endian = big; then
+ csc_compiler=mcs
+ elif test $endian = little; then
+ csc_compiler=roslyn
+ else
+ csc_compiler=mcs
+ fi
+fi
+AC_MSG_RESULT($csc_compiler)